Home Postcode finder ACT Black Mountain Black Mountain postcode ACT Black Mountain is a locality in Australian Capital Territory covered by postcode 2601. Postcode 2601 State or territory Australian Capital Territory (ACT) Region Canberra Add a free Black Mountain business listing Be the first listing in Black Mountain Common questionsWhat is the postcode for Black Mountain?Black Mountain, ACT has the postcode 2601.What state is Black Mountain in?Black Mountain is in Australian Capital Territory (ACT).Does postcode 2601 cover more than one suburb?Yes. Postcode 2601 covers 3 localities, so the postcode alone does not identify Black Mountain. Browse other postcodes in Australian Capital Territory, or widen the search to every Australian postcode.